Telegraph printer



Feb. 1, 1944. -c. .J. FITCH ETAL.

TELEGRAPH PRINTER Filed Nov. 18, 1941 5 Sheets-Sheet 1 RN 7 MPH m mmLEW! Q ATTORNEY TELEGRAPH PRINTER 5 SheetsSheet 2 Filed Nov. 18, 1941ArToRNEY Feb. 1, 1944. c. J. FITCH ETAL TELEGRAPH PRINTER 5 Sheets-Sheet3 Filed Nov. 18, 1941 ATTORNEY Feb. 1, 1944. c. J. FITCH ETAL TELEGRAPHPRINTER 5 Sheets-Sheet 4 Filed Nov. 18, 1941 FIG. 6.

M ATTORNEY b- 1944- c. J. FITCH ET AL I TELEGRAPH PRINTER Filed Nov. 18,1941 5 Sheets-Sheet 5 ATTORNEY Patented Feb. 1, 1944 TELEGRAPH PRINTERClyde .1. Fitch, Endwell. and Kurt It. Schneider,

Endicott,

N. Y.. asslgnors to International Business Machines Corporation, NewYork, N. Y.. a corporation of New York Application November 18, 1941,Serial No. 419,574

13 Claims. (Cl.-17834) The present invention relates toprinting'telegraphy and more particularly to a receiving printer whereina message is recorded by impressing characters upon a tape.

The invention embodies a novel combination of permutation code signaloperated selector mechanism and reset means, for controlling therotative and axial positioning of a typewheel and resetting saidtypewheel rotatably and axially, and also novel tape feeding and tapeguiding means, novel printing and print regulating means and novelsimplified shift mechanism.

More specifically, the device embodying the invention comprises anextremely compact telegraph receiver, insertible into the instrumentpanel of an aeroplane.

One of the objects of the present invention is to provide a novelcombination of signal controlled rotatable permutation members and biasmeans controlling said rotatable members, said' members being merelytriggered, for operation by said bias means, whereby said rotatablemembers are selectively positioned in accordance with received signalsof very little energy.

A further object is to provide a telegraph receiver of the type operatedby permutation code selector mechanism, said selector mechanismcomprising novel rotative permutation members, means for locking saidmembers in different'rotative permutations, and means for resetting saidlocking means to a chosen series of positions whereby said membersassume a chosen initial position.

Other objects of the invention will be pointed out in the followingdescription and claims and illustrated in the accompanying drawings,which disclose, by way of example, the principle of the invention andthe best mode, which has been contemplated, of applying that principle.

In the drawings:

Fig. 1 is a front elevational view, partly in section, illustrating thetypewheel positioning mechanism. v

Fig. 2 is a side elevational view, partly in section, illustrating thetypewheel positioning mechanism and drive means therefor.

Fig. 3 is a top, plan view of the complete novel printer, including thetape feed mechanism.

Fig. 4 is a bottom, plan view, on an enlarged scale, of a portion of thenovel printer.

Fig. 5 is a perspective view, on an enlarged scale, illustrating thedetails of the clutch mech,

anism utilized in positioning the typewheel.

Fig. 6 is a sectional view taken on line 6--6 of Fig. 7 is a'sectionalfragmentary view, on an enlarged scale, taken on line 1-1 of Fig. 3.

Fig. 8 is a sectional fragmentary view, on an enlarged scale, taken online 8-8 of Fig. 4.

Fig. 9 is an exploded view, on an enlarged scale, illustrating thedetails of the shift mechanism for rotatably shifting the typewheel.

Fig. 10 is a. detail view. on an enlarged scale, illustrating theprinting and shift mechanism.

Fig. 10a is a detail view illustrating a portion of the mechanism ofFig. 10.

Fig. 11 is a perspective view, on an enlarged scale, illustrating thedetails of the adjusting and operating mechanism for the printinghammer.

Referring to the drawings and more particularly to Figs. 1, 2, 3 and 4,the novel printer comprises a supporting frame 20 (Figs. 2, 3 and 4)including a front panel 20, a side frame member 20b and protrudingsemicircular front portions 20c.

A motor 2| (Fig. 3) carried by the frame 20 drives shaft 22 carrying theworm 23 meshing with worm wheel 24 carried by shaft 25 (Fig. 2). Shaft25 is suitably journaled at each end in frame 20 and carries at one endthereof the fiber driving gear 26 (Figs. 1 and 2) for driving themechanism controlling the rotative positioning of the typewheel. At itsother end, the shaft 25 carries the fiber driving gear 21. for drivingthe mechanism that axially positions the typewheel.

By the mechanism just described, motor 2! drives shaft 25 at 900 R, P.M., which is not synchronous speed but is faster than the speed of theincoming signals.

Gear 26 meshes with gear 28 carrying a shaft 29 on which is mountedratchet gear 30.

Gear 21 meshes with gear 3| carrying a shaft 32 on which is mountedratchet gear 33.

Fig. 4, and rotated QO-degrees counterclockwise. 5

Gears so and 33 are thereby driven at 1200 R. P. M. Gear 30 drives theeight position clutch mechanism 34, which in turn is controlled bypermutation disk mechanism, all as described presently, to rotatablyposition shaft 35 and typewheel 36, while gear 33 drives the fourposition clutch mechanism 31, also controlled by permutation diskmechanism, to rotatably position the cylindrical cam member 38 which, asdescribed later, by its rotative positioning controls the axialpositioning of the typewheel.

Clutch 34 rotatably positions the typewheel 33 'in any one of eightuniformly distributed rotative positions whereby any one of eightvertical columns of characters (Fig. 2) may be selectively positioned inprinting position. Novel shift mechanism is also provided, asdescribedlater,

to further rotatably position the typewheel 36, in positionsrespectively intermediate each of these eight rotative positions,whereby the typewheel is selectively adjusted to alternate ones of"revolution only. Shaft 43 carries a plurality of cams, so distributedcircumferentially of shaft 43 as to operate in proper time sequence, theribbon feed, tape feed, printing hammer cookingand release mechanism,restoring mechanism and shift mechanism of the novel printer, all asdescribed in detail later.

Clutch mechanism The clutch devices 34, 31 and 42 may be of the typ asfully shown and described in Patent No. 2,206,646, granted to Kurt R.Schneider July 2, 1940. Referring to Fig: 5, there is illustratedtherein the construction of such a clutch, which in the particularinstance, may be rotatably positioned in any one of four differentpositions (such as clutch 37 of Fig. 2) but it is to be understood thatthe construction of each of the clutches 34, 31 and 42, respectively, isthe same, with the sole exception of the number of rotative positions tobe assumed by the clutch. As illustrated in Fig. 5, the clutch comprisesa cylindrical member 44 provided with a series of four notches 4412distributed about a flange member 44a integral with member :14. A shaftportion 441), also integral with member 44, is provided, whichinternests with the associated driven member, as described later, totransmit the rotation of'the member 44 to the associated driven memberand thereby rotatably position the driven member similarly to therotative positions assumed by member -34. A pivoted pawl member 45 (seealso Figs. 4 and 6) is urged by spring element 46 into engagement withthe iiange member 44a to cooperate with a notch 441a and thus preventback rotation of the clutch, when stopped in any one of its fourpositions. The face 44f of member 44 of the four position clutchillustrated in Fig. 5, is located adjacent its cooperating ratchet gear33 (see also Fig. l), driven by shaft 32, as described above. A channel$40 is provided in face 44,, in which channel is slidably mounted a dogmember 41 provided with an axially extending tooth 411% which alsoextends radially towards thetoothed periphery of ratchet gear 33. Amember 44d, integral with member 44, extends axially into the channel440, as shown in Fig. 5 and also part way diametrically of member 44. Aspring member, as disclosed in said Patent No. 2,206,646, abuts member44d and spring biases member 41 so that the tooth 4lt tends to engagethe teeth of ratchet gear 33. "A dog lift lever 48 (see also Fig. 4) ispivoted by its ball-shaped end 48p fitted into a socket in the face 44],and extends crosswise of dog 41 and engages dog 41 with itscenterportion. The other end of lever 48 is cut diagonally to form atooth 48t projecting beyond the circumference of member 44. A slot 44sis formed in the face of member 44, generally at right angles to channel440, to permit oscillation of dog lift lever 48 with respect to 44,about ',the ball and socketconnection, when 48t is enaged by a stopmember 49 controlled by the permutation disk members, as describedlater. This oscillatory movement of lever 48 is transferred to dog 41 tomove the dog, longitudinally of itself against the force of its biasingspring, and into the position as illustrated in Fig. 5. When a stopmember 49 is moved radially to release tooth 48t, lever 48 willthereupon permit dog 41 to be moved to the left, as viewed in Fig. 5,under the influence of its biasing spring, to thereby engage tooth 4ltand associated ratchet gear 33, whereby the rotation of gear 33 istransmitted to member 44 and shaft 44b.

Typewheel positioning Novel means are now provided for completelypositioning the typewheel, which comprise means for rotatablypositioning the typewheel, means for axially positioning the typewheeland means for zone positioning or shifting the typewheel, which zonepositioning comprises rotatively positioning the typewheel intermediateeach of the eight assumed rotative positions mentioned above, todetermine which character out of two primary groups of characters willbe printed. These three sets of means will now be described in detail.

Rotative iiionino of the typewheel As illustrated in Figs, 3 and 4, aplurality of five permutation magnets and also a printing magnet areprovided. Each of the five permutation magnets is responsive to oneelement of a 5- unit code signal received. Three of th magnets 50, 5!and 52 (Fig. 3), controlled, respectively. by the first, second andfifth code signal elements. are utilized to control permutation disk orring men which. in turn regulate the rotative po- 6 of the typewheel.Two of the magnets iFig. 4) controlled, respectively, by the fourth codesignal elements are utilized r l the permutation ring members which .rethe axial positioning of the typewheel. rint magnet 54 controlsmechanism for rear g the rotation of clutch 42 to produce a s revolutiononly, of clutch. 42 and its associated shaft 43, which in turn controlsthe zone positioning of the typewheel and also controls, in propersequence, the tape and ribbon feed, the print hammer cocking andreleasing functions an... he reset functions. W hen sequential, codeelements are utilized, as may be assumed in t stant application, printmagnet 54 is conti led b the stop element of the permutation co. .znentsof a full complete signal which COl'll;,.cC6 signal when the 5-unit codeis utilized comprises a start element, five code signal elements proper,and a stop element.

Referring to Figs. 3 and 7, there is illustrated the permutation meansassociated with clutch 34 for selectively rotatively positioning thetypewheel. As is seen in Fig. 5, clutch 34 is stopped by engagement oftooth 4812 of its clog lift lever 48 with a tooth 4st of a stop member43 (Fig. 5). Each stop member 49 is provided with a laterally projectingsupport member carrying its tooth 491. and also with a laterallyextending supportmem- -ber carrying projection 49p (see also Fig. 4)which cooperates with notches in the permutative members, as describedpresently. The laterally ex-- tending support members for 492% and 49;)provide a channel 49c. Eight such stop members 49 are distributedcircumferentially about clutch 34. A set of three permutationselectorrings 56, 51 and 58 (Fig. 7) are disposed 'coaxially with clutch 34, theannular portion of the rings being located within each of the channels490 oi the eight stop members, respectively. These rings are maintainedin position, coaxial with clutch 34, by a projecting circular frontportion 26c of casing 26- (Fig. 3) and by the eight stop members 49,distributed circumferentially of the permutation ring members. Each ofthe stops 49 is mounted for movement radially of the annular permutationmembers and is constantly urged toward the center of the annular membersby means of an individual spring 49s. Each of the three permutationrings is held against bodily lateral movement by means of a member 59(see also Fig. 6) provided with an annular channel 59c in which therings are located. Member 59 is also provided with a series of radiallyextending openings 591' in which are located the respective stops 49. An

annular cover plate 60 serves to hold the rings in ball members 60aserve as antifriction members.

for rotatively mounting the respective rings.

Each of the rings 56, 51 and 58 may be rotated by means of a lever 6|(Fig. 3) pivoted at Glp and biased by spring Us for counterclockwiserotation. A lug 6|a on lever 6| is pivotally connected to itscorresponding permutation ring (ring 56, for example) whereby the ringis rotated clockwise upon counterclockwise rotation of lever 6|. Eachlever 6| is maintained in the cocked position, as illustrated in Fig. 3,by a trigger ele ment 62, pivoted at 62p and biased by springs 61's forclockwise rotation. A lug 62a on trigger 62 engages a shoulder 6|c onlever 6| to hold the lever 6| in cocked position. A l nk 63 is pvotallvattached to each trigger 62 and is also pivota'lly connected to apivoted armature 64. one for each of the magnets 50. 5| and 52,respectively (Fig. 3),

and likewise one for each of the magnets 53, 54 and 55 (Fig. 4). Uponenergization of any magnet, its associated armature 64 is rotatedclockwise (as viewed in Fig. 3) to move the link 63, to

the left, to rotate trigger 62 counterclockwise,

to thereby release the cocked lever 6| for counterclockwise rotationunder the influence of its spring 6|s, which furnishes the motive powerto in turn rotate the associated ring clockwise. It is obvious that onlya short, relatively weak signal is required to actuate the magnets andthereby the rings. since the work required to rotate the rings isactually performed by the springs 6|s, the magnets merely controllingthe trigger elements.

The relative rotation of the rings 56, 51 and 58 aligns a single set ofindividual notches 65 (Fig.

4) formed in the outer peripheries of the respec tive rings. I eitherone of two positions and since there are three rings provided. a totalof eight permutative positions may be obtained. Each of three rings(Fig. '7) is therefore provided with eight notches (as compared to thefour notches as illustrated in Fig. 4) the notches on the respectiverings being so positioned relatively to each other that a plurality ofthree notches, and three only; one only on each of the ringsrespectively; will be aligned Since each ring can be operated to 4rotated to any one of its several assumed positions, in the leastpossible time. For example, it may be assumed, as stated above, thatunder ordinary sequential code signal element operation, magnets 50, 5|and 52 (Fig. 3) are energized by the first, second andfifth actual codesignal elements, respectively, ofa five element code. Upon energizationof magnet 52, ring 53 will be released and that stop member 49, nowillustrated in Fig; 3 as engaging dog lift lever 48, will be cammed outOf its associated notches 65, by point 49p riding up the sides-of thenotches as the ring 58 is rotated clockwise, and dog lift lever 48 willtherefore be released. The notches of the three 'rings 56, 51 and 58 areso chosen and arranged,

that when magnet 52 only, is energized, and ring 56 only is rotated, theimmediately adjacent stop, in a counterclockwise direction from the stopnow illustrated as engaging lever 48 in Fig. 3, will be aligned withthree notches in the respective rings 56, 51 and 58. Therefore, when doglift lever 45 is released from the position, as shown in Fig. 3, dog 41(Fig. 5) of clutch 34 is moved by its spring to engage tooth 4lt and theassociated rotating ratchet gear 3|) of clutch 34 (Fig. 2). Clutch 34 isthereupon rotated until dog lift lever 48 (Fig. 3) engages tooth 491? ofthe immediatel adjacent stop 49, and the clutch is thereby stopped afterhaving completed one-eighth of a revolution. If

magnet 5| only, is energized, ring 51 only, is released for rotation andclutch 34 will rotate onequarter of a, revolution from the position asshown in Fig. 3. If magnet 5| is first energized and magnet 52 issequentially energized, the clutch will be permitted to rotatethree-eighths of a revolution. If magnet 50 alone is energized, theclutch Will be permitted to rotate a full half revolution. If magnets 59and 52 are both energized, the clutch will be permitted to rotatefiveeighths of a revolution, if magnets 50 and 5| are both energized theclutch will be permitted to rotate six-eighths of a revolution and ifmagnets 50, 5| and 52 are all sequentially energized, the clutch will bepermitted to rotate seven-ezghths of a revolution. It is seen,therefore, that upon sequentia1 operation of the magnets 50, 5| and 52,the clutch 34 will always advance to its selected position in theshortest possible time. This is likewise true of magnets 53 and 55 andtheir associated clutch 31 (Fig. 4)

Novel means are also provided whereby all of the levers 6| associatedwith magnets 50, 5|, 52, 53 and 55 are reset to cocked position, asillustrated in Fig.3, following the reception of each group of codesignal elements comprisin one complete signal and lever 6|b, associatedwith print magnet 54 is also reset. Upon release of the singlerevolution clutch 42 (Fig. 2), as described presently, shaft 43 isallowed to rotate one single complete revolution. During the rotation ofshaft 43, a reset cam 66 (Figs. 2 and 3) carried by shaft 43 forrotation therewith is engaged by a roller 61 on reset lever 68 (Fig. 3)which ,roller is continually biased against the cam 66 b means of spring68s acting on lever 68. Upon this rotation of cam 66, the reset lever isrotated clockwise, as viewed in Fig. 3, and a lug 68b integral withreset lever 68 en ages the sides of notches '6ln formed in each of thethree levers 6| (Fig. 3)

to rotate these levers clockwise about their pivots against the force oftheir respective springs Ms until the levers are restored to cockedposition and locked by the triggers 62, as illustrated in Fig. 3. LeversBI and 6") (Fig. 4) associated with magnets 53, 54 and 55 are similarlyreset by cam 66a, rollers 61a and lever 68a with its lug 63c. Continuedrotation of cam 66 permits the lever 33 to rotate to the position, asshown in Fig. 3, so that rings 56, 51 and 58 are free to rotate when thetriggers 62 are released and levers 6| are operated. Restoration of therings again aligns that particular stop 43, as illustrated in Fig. 3, topermit clutch 34 to rotate until dog liit lever d3 engages the tooth "tof stop 49, in the position as illustrated. It is to be noted that theclutch 34 during this last portion 01' its movement, movescounterclockwise or in the same direction as during its previousoperation, so that the restoration of the clutch 34 and its controlledshaft 35, which determines the'rotative position 01' the typewheel 38,is always in the same direction. It is seen, therefore, that the clutch34 can assume any one of eight rotative positions, determents received,and is returned to a chosen normal position after reception of eachcomplete code signal. Similarly clutch 3 1 can assume any one of fourpositions, and is returned to a chosen normal position while clutch 42is limited to one complete revolution.

As illustrated in Fig. 5, each clutch is provided with a shaft bintegral with the clutch body 44. Shaft b of clutch 34 (Fig. 1) isinserted in an axial opening in the shaft 35 and is connected to theshaft for rotation thereof by a pin 35?. Upon rotation, therefore, ofclutch 34, to any one of its eight positions, this rotation istransmitted to shaft 35.

A lower end of shaft 35 is reduced in diameter and passes throughbracket 69 attached to the front panel a and also passes, through anaxially extending bored portion 69a integral with bracket 63, and intoan axial opening 380, formed in the cylindrical cam 38 whereby the cam38 is aligned with shaft 35. A spring 36s surrounds the upper end ofshaft 35 and resiliently biases the typewheel 36 downwardly, as viewedin Fig. l. Shaft 35 is provided adjacent its reduced portion with a pairof axially extending key ways 35k, 3570. A groove collar member 10 (seealso Fig. 9) is provided with radially inwardly extending lugs extendinginto the key ways 35k, respectively, whereby the rotation of the shaft35 is transmitted to member 10, but with member 10 free to move axiallyof shaft 35. Integral with collar 10 is a disk 10d provided withopposite, radially extending slots 10s, 10s (Fig. 9). A cylindricalmember 100, also integral with collar 70, extends axially of andsurrounds the shaft 35 (Figs. 1 and 9). A circumferentially extendinggroove 10g (Fig. 9) formed in the end of member 100 provides a bearingrace for the ball bearings 36b (Fig. 1) which also engage a race formedin the interior of typewheel 36, to provide an antifriction mounting forthe typewheel, so that the typewheel can be easily rotated, with respectto shaft 35, as described presently. Typewheel 36 is also provided withan axially extending opening in which is inserted a spring ll and aretaining ball 12. The end of the axially extending opening in typewheel36 is smaller than the diameter of the .ball so that only a portion of ahemisphere of ball 12 extends-externally of the bottom face of typewheel36 (Fig. 1) A radially slidable, zone selection or shift member 13 (Fig.9) is mounted on cylindrical member by means of an elongated orelliptical opening 13a formed in the slide 13. Slide 13 is provided onone face with a pair of projecting lugs l3bl, 13b2, disposed on oppositesides diametrically of slide 13,.which lugs fit into and abut the sidesof slots "is when member 13 is mounted in position on member 100, asillustrated in Figs. 1, 2 and 10. The opposite face oi slide 13 isprovided with a cylindrical operating lug 13c which rides in and engagesthe sides of slot 14 (Figs. 9 and 10). Upon radial movement of slide 13in such a direction that operating lug is moved radially inward, the lugengaging the sides of groove M will rotate the typewheel 36one-sixteenth of a revolution in one direction, while upon movement ofslide I3 radially, in such a direction that lug 13c moves radiallyoutward, the typewheel 36 is rotated in the opposite directionone-sixteenth of a revolution. A single lug 730 only, cooperates with asingle radial groove I4 only, and serves to rotate the typewheel ineither one of two required directions. A pair of indentations 13c, 13a,is provided on the same face of slide 13 as operating lug 130 (Fig. 9)adjacent the typewheel 36. Upon radial movement of slide 13 in onedirection, ball 12 engages one indentation, and upon radial movement inthe opposite direction, ball 12 engages the other indentation, tothereby retain slide 13 in either of its assumed positions. Ball 12 andthe indentations 13a also serve to retain the typewheel 36 in one or theother of its rotative positions with respect to shaft 35. cooperationwith shift operating mechanism, to be described presently, is alsoprovided on this same face.

As is seen in Fig. 2, typewheel 36 is provided with sixteen vertiballyextending columns of characters, each column comprising alternately"figures" and letters" characters. By rotation of the typewheel 36 undercontrol of shaft 35 and clutch 34, any one, of eight uniformly,circumferentially distributed columns of characters is selected, andupon further rotation oi. the typewheel one-sixteenth of a revolution,with respect to shaft 35, one of two adjacent columns of characters,namely, figures or letters" is chosen, so that the final rotativepositioning of the typewheel with respect to shaft 35 is a zoning orshift function. This zoning or shift function, will be described indetail Presently, and is produced by engagement of shift operatingmechanism with the abutting lug 1327 (Fig. 9) or the lug 1317!, whichlast lug serves the dual purpose of an abutting and a guiding lug.

Novel means for axially positioning he typewheel will now be described.

Axial positioning of typewheel The two magnets 53 and 55 (Fig. 4) andthe associated permutation ring members 15 and 16, which are similar tothe ring members 56, 51 and 58, described, above, control mechanismwhich in turn controls the axial positioning of the typewheel. Magnets53 and 55, respectively, control the rings 15 and 16 by means ofarmatures 64, links 63, triggers 62 and pivoted levers 6|, in the samemanner as magnets 50, 5| and 52 control their respective rings 56, 51and 58. Relative rotation of rings 15 and 16 selectively aligns theirnotches 65 in difierent permutations, so that the four stops 49 (Fig.4), cooperating with rings I5 and 16, may be selectively renderedeffective, and the dog lift lever 48 of clutch 31 can be An abutting lug13b, for a selectively positioned at any one of four different rotativepositions and in the shortest possible time. The control of clutch 31is, therefore, the same as that of clutch 34 with the sole exceptionthat clutch 31 can be stopped in only four different positions insteadof the eight of clutch 34.

The permutation disks l5 and 16 are reset to their normal positionsunder control of their as-' sociated levers 6i, by means .of cam 66a(Fig.2) roller 81a, lever 68a. and lug 680 in the same manner as thepermutation disks 56, 51 and 58 are resetby means of their'associatedcam 66, roller 81 and arm 68, all as described above.

A plurality of four notches 4411. (Fig. cooperates with pawl 45, asstated above, to prevent back rotation in any one of these fourpositions.

Similarly, as is seen from Fig. 4, the magnet- 54, whichmay bedesignated as the print magnet, controls its trigger 62 by means of itsassociated armature 64 and link 63. Trigger 62 of the print magnet 64controls a pivoted lever 6ib,

generally similar to the levers 8i, and pivoted for rotation about pivotSip. Lever 6ib, however, is not attached to any permutation ring memberbut projects into the path of rotation of the dog lift lever 48 ofclutch 42, and is held in position to intercept the lever 48, bycoaction with its trigger 62. Upon energization of print magnet 54, itstrigger 62 releases lever 6ib for rotation clockwise under control ofits associated spring 6 is until the end of lever 6 lb is moved out ofthe path of rotation of lever 48, and the single revolution clutch 42 isreleased for rotation. Also, lever 6| 1) is reset to the position, asindicated in Fig. 4, by means of the reset cam 66a, roller 67a, resetarm 68a and lug 68c employed in resetting the permutation disks l5 and16. The cam 66a (Fig. 2) is so positioned on shaft 43, controlled by thesingle revolution clutch 42, that the permutation disks 15 and i6 andthe lever 6ib, arereset prior to completion of one complete revolutionof clutch 42, so that lever Bib is returned to the position, asillustrated in Fig. 4, in time to intercept the dog lift member 48 andhalt the lever 48 in the position, as shown, to thereby terminate thesingle revolution of clutch 42. The shaft 44b (Fig. 5) of clutch" isinserted into an opening in the shaft 43 (Fig. 2) and is connected tothe shaft 48 by a pin connection 430..

The shaft 44b. of clutch 31 (Fig. 1) is inserted into the axial opening380. of cylindrical cam member 38 (Fig. 1) and is attached to cam member38 by pin 38p so that the rotation of clutch 31 is delivered to the cammember 38 to rotatably position the cam member in any chosen one of fourpossible positions. Cam member 38 is provided with a cam groove 389. Athick roller ll engages the sides of cam groove 389, as seen in Fig. 1,and means are provided whereby roller Ti is moved up and down, oraxially of shaft 35, upon rotation of cam member 38. A thick platemember 18 is attached by screws 18 to the front panel 28a. Cut into theedge of plate 18, adjacent the cam element 38, is a large groove i8gi(Fig. 2). In the opposing side walls of groove 189! there are also cuttwo pairs of small guide grooves 1892, the respective grooves of eachpair being aligned in the direction of the thickness of plate 18. Aplurality of thin rollers 88, of slightly larger diameter than rolleri1, is carried by a member 8! and these rollers ridein the grooves i8g2,to provide an antifriction mounting for the member 8! and to retain itwithin the large groove 189i of plate 18. Roller I1 is also attached tomember 8i and upon rotation of the cam member 18, since the roller I1 isrestrained, by means of member 8i, against bodily rotation with member38, the roller "i moved upwardly or downwardly as 't rides upon thesides of cam groove 38a. The upward and downward motion of roller I1 istransmitted to member 8|, which also carries a second roller Ha, similarto roller 11, adjacent its upper end (Fig. Roller 11a. is located withinthe groove 18; of the grooved collar 18, which collar, as stated above,is mounted for rotation with shaft 35 but is free to move axiallythereof. Roller i'la transmits the axial movement of roller TI andmember 8i to the collar 18. Since, as described above, the collar 10 isintegral with disk 18d (see also Fig. 9) while 10d and slide 13 carry.the typewheel 36, the typewheel is selectively positioned axially, inany one of four chosen axial positions upon rotation of cam member 38and consequent axial movement of member 8i. As is seen from Fig. 2,typewheel 38 is provided with four horizontal rows of charactersextending circumferentially about the periphery of the typewheel so thatany one row can be chosen by the axial positioning of typewheel 36. By.the rotative positioning of the typewheel under control of clutch 34,

as described above, any one of eight circumferentially, uniformlydistributed vertical columns of characters can be selected. Itistherefore seen, that by the combined axialand 'rotative movement oftypewheel 36, any one character, out of any one of ight vertical columnsof characters, can be selectively located in position for printing. Inorder, however, to select one of two characters out of one of twoadjacent vertical columns, novel shift or zone positioning mechanism isprovided, which will now be described.

I with novel means on the typewheel, as shown and described inapplicants copending application Serial No. 419,575, filed November 18,1941, for producing zone positioning or shift. In one extreme axialposition of the typewheel, the zon positioning or shift slide element 13is so located axially and also oriented circumferentiall that the shiftoperating mechanism can radially shift slide 13 to rotate the typewheelone-sixteentth of a revolution in one direction, which operationcomprises one shift function of the typewheel from "letters" to figures?or vice sides'of the generally radial slot 14 in the typewheel 36torotate the typewheel one-sixteenth of a revolution, either in onedirection or the other depending upon the direction of movement of slide13. When the shift operating mechanism cooperates with lug 13bi to moveslide 13 so that operating lug is moved radially inward, the lug 13ccooperateswith the sides of slot i i to rotate the typewhel in onedirection and when the shift operating mechanism cooperates with theabutting lug 13b to move slide 13 so that operating lug 13c is movedradially outward, .the typewheel 36 is rotated one-sixteenth of arevolution in the opposite direction.

As shown in Figs. 2 and 10, a pair of shift operating levers 82 and 83is provided. When standard-teletype shift signals are employed, thefigures" signal places the typewheel 36 in its extreme lower position,as viewed in Fig. 2, while the letters" shift signal places thetypewheel 36 in its extreme upper position. Lever 82 I operates with lugI3bI, in the extreme lower position of typewheel 36, to radially moveslide I3 so that lug 130 is moved radially inward to rotate typewheel 36and perform the figures shift function. Lever 83, on the other hand,cooperate with abutting lug 13b, in the extreme upper position oftypewheel 36, to move lug 13c radially outward and thus rotate typewheel36 to perform the letters shift function.

As is seen in Fig. 10, levers 82 and 83 are each pivotally mounted foroscillation about pivots 82p and 83p, respectively.

An elongated slot 83s is formed in lever 83. Spring 84, attached at oneend to a lug 85 firmly fixed to the frame 28, is hooked at its other endto lever 83 and urges lever 83 to the position, as shown in Fig. 10,with the pivot 83p engaging the wall at one end of slot 83s. If, for anyreason, lever 83 is prevented from rotating about pivot 83p uponoperation of its operating cam, as described presently, lever 83 andslot 838 are moved to the right, as viewed in Fig. 10, and against theforces of spring 84 whereby breakage of the lever 83 is presented. Lever82 is similarly resiliently mounted on pivot 82p. Further, levers 82 and83 are respectively mounted for movement axially of pivots 82p and 83p,respectively, and against the force of associated springs 82a and 83a(Fig. 2) so that the levers 82 and 83 are further protected againstbreakage due to strain.

Each of the levers 82 and 83 is provided with an operating lug 82b and83b, respectively (Fig. 10). A cam 86 (Figs. 2 and 10), mounted on shaft43 for rotation therewith, is provided with a pair of oppositelyextending cam rollers 86a and 86b, cooperating respectively with lugs82b and 83b of the shift operating levers 82 and 83. As shaft 43 isrotated, cam 86 rotatesits cam rolers 86a and 86b to simultaneouslyengage the lugs 82b and 83b, respectively, to simultaneously oscillatelevers 82 and 83 about their respective pivots.

Upon reception of the figures" shift signal,

the typewheel is positioned in its extreme lower position, so that uponoscillation of lever 82, its operating end 82c will engage lug l3bI(Fig. 9) of slide 13 to radially move this element and thereby rotatetypewheel 36 one-sixteenth of a revolution in one direction, asdescribed above, to perform the figures shift function. On the otherhand, upon reception of the letters shift signal, typewheel 36 islocated in its extreme up per position, and the operating end 83c oflever 83 will engage the cylindrical abutting lug 131) (Fig. 10) ofslide 13 and the typewheel 38 will be rotated one-sixteenth of arevolution in the opposite direction, to thereby perform the "letters"shift function.

Tape feed Novel tape feeding and tape guiding mechanism, as shown anddescribed in applicants copending application Serial No. 419,576, filedNovember 18, 1941, is provided for feeding the tape,

stepby step, past the printing position and for guiding the tape. A rollof tape 81 (Fig. 3) is mounted within the tape roll support 88 attachedto frame 28 by a bolt 88:: and slotted link'88b. Tape 8'! unwinds fromits roll and passes under a guide roller 88 to a printing hammer supportmember 88 and within the upper tape guide slot 88a (Fig. beneath a novelarcuate-shaped tape guiding member, described presently, and 10 aroundthe end 8827 of the hammer support 88,

and into lower guide slot 88a and tape guide 8| (see also Fig. 1),across the front panel 28a of the printer, so that as the characters areprinted by the printing mechanism, the printed charac- 15 ters appearimmediately in easily readable position on the face of the printer. Tape8'! (Fig. 8) is then fed between the knurled feed rollers of the noveltape feeding mechanism, which will now be described.

Mounted on shaft 43 for rotation therewith is an eccentric disk cam 82(Figs. 2 and 3) provided with a peripheral, and radialiy extending slot83 (Fig. 2). An unequal Y-arm lever 84 pivoted at 84p is provided with ashort arm 88a and a long arm 84b fitting into the slot 88 in the diskcam 82 and embracing the small eccentric center of this cam (Fig. 8).Long arm 84b is pivotally connected, adiacent its free end, to a link 86for operating the tape feed device. A lever 96 is integral with theeccentric three point star member 8611 mounted for oscillation aboutshaft 81 journaled in member 88 attached to the front panel 28a by pivot88: A series of holes 88b are provided in lever 86 whereby theconnection of link 85 to lever 86 can be varied, to change the amountthat the tape is fed for each oscillation of lever 86. In this manner,the spacing of the characters on the tape can be varied at will.

Lever 86, upon oscillation in a counterclockwise 0 direction, similarlyoscillates eccentric 88a. Balls 88 located between the outer peripheryof member 86a and an inner race I88 of gear I8I, mounted freely on shaft81, lock the member 860 and race I88 together upon such counterclockwiserotation, due to the eccentricity of the periphery of member 86a. BallsI88 are constantly urged towards engaging position by the springelements I80a abutting the straight ledge portion of the fingers,respectively, of member 86a. Upon the return stroke, in-a clockwisedirection, of lever 86, the. balls I88 no longer wedge togethereccentric member 86:: and the race I88 of gear IN, and gear I8I will notbe rotated in the opposite direction. 'It,is seen. therefore, that uponeach gear I8I will be rotated a predetermined amount in acounterclockwise direction only. Gear I8I meshes with gear I82, mountedfor rotation on frame member 88, which gear I82 carries a pair ofknurled rollers I83 (only one shown in Fig. 3) engaging the tape 81.Gear I82 meshes with gear I84,'suitably mounted for rotation, on panel28a,- and carrying another pair of knurled rollers I88 (only one shown)aligned respectively with 65 the knurled rollers I83, so that the feedrolls are rotated to feed the tape past the printing position, theamount of tape feed, and the spacing of the characters on the tape,being determined by the particular connection between link 85 and lever88. as described above. The tape 81 can also be pulled by hand to feedthe tape past the printing position. since this action rotates gear I8Icounterclockwise, so that the balls 88 do not lock with eccentric member88a.

7 Frame 88 is pivoted at 889, as stated above.

complete back and forth stroke of link 86, the

and is urged constantly counterclockwise by spring 98s so that therespective knurled feed rollers I03 are held tightly in engagement withthe tape 81 and force the tape 81 tightly into engagement with therespective rollers I05. To feed a new tape, frame 98 can be forcedclockwise, against the force of spring 98s, to release the pressurebetween the knurled rollers I03 and I05.

As is seen from Fig. 10, the end 901) of the printing hammer support,provides a sharp turn-' ing bend for the tape. To guide the tape aroundthe end 90b when the tape is being threaded into position, a novel tapeguiding member is provided. An arcuate-shaped member I06 (Fig. 10) isattached to member I01 pivoted at N13) and provided with a fingeroperating portion Ila. A spring I0'Is is attached to the printing frame90 at one end and to member I01 at the other end to bias the tape guidemember I08 to the position, as shown in Fig. 10. When a tape is insertedinto the upper tape guide slot 00a and fed to the right, by hand, membermm is urged manually to the left, to rotate the arcuate member I06clockwise to a position between the end 90b of member 90 and thetypewheel 36. The

arcuate member thereby serves as a guide tov thread the tape around thesharp bend of end 90b of member 90 andinto the lower guide slot 90a ofmember 90 and the tape guide 92-on the front panel of the printer.Member MM is thereupon released and assumes the position, as ihown inFig. 10, and tape 81 (Fig. 3) is fed by hand between the knurled rollersI03 and I05, by clockwise rotation of frame 98, as described above. Thetape is then ready for automatic feed under control of the tape feedmechanism as controlled in turn by the rotation of shaft 43.

Ribbon feed and ribbon reversal mechanism I08 (Fig. 3) is provided,which may be of the type as shown and described in applicants copendingapplication Serial No. 354,035, filed August 24, 1940, to whichreference may be had for a more detailed description. The ribbon feedmechanism is operated by link I09 (Fig. 3) connected to the long arm 94bof the unequal Y-arm oper-' ating lever 94. Upon oscillation of lever94, as previously described, the ribbon I I0 is fed, in one direction orthe other, over guides III and between the typewheel 36 and the tape, asit bends around the end 90b of hammer support 90.

Printing mechanism Novel printing and printing control mechanism, asshown and described in applicants copending application Serial No.419,577, filed November 18, 1941, is provided. A reciprocable'hammermember H2 (Figs. 10 and 11), provided with a printing head IIZa, ismounted for reciprocation in printing hammer support member 90. Athreaded member II3 (Fig. 10) threaded into support 90 provides aninteriorly located abutting surface II3a against which rests one end ofa coil spring II2si surrounding the hammer H2 and abutting the lugsH21), II2b, integral with hammer II! and urging hammer head M to engagethe tape 87, ribbon I I0 and typewheel 36. A pair of opposed shouldersH20 and H211 (Fig. 11) is also provided on hammer II2. A spring II2s2(Fig. 10) surrounds hammer H2 and rides freely between shoulders H20 andII2d, in the cookedposition of hammer II2, as illustrated in Fig. 10,and the coiled spring extends above and below the flat top and bottomsurfaces of hammer head IIZa (Fig. 10a). Upon release of the hammer fromits cocked position, shoulder IlZc moves -'7 spring is! into engagementwith a shoulder 90s (Fig. 10a) of member 00, and the spring H281 iscompressed as hammer head II 2a impinges against tape 01 to engage thetape, ribbom III and typewheel 36. The compressed spring 232 thereuponexerts its force against shoulder II2c and moves the released hammer,out of engagement with thetape, to thereby release the tape, ribbon andtypewheel.

Hammer 2 is also provided with a latching shoulder II2e (Figs. 10 and11) which engages a tooth Illt of a trigger lever Ill pivoted at I Ilp.Trigger l is biased in a counterclockwise direction by a spring Ills. Acylindrical lug Illa is provided on trigger I for releasing the trigger.Bell-crank IIIi (Fig. 10) is'pivoted at I lip and is biased in acounterclockwise direction by spring IISs. The bell-crank I I5 isprovided at one end of one arm thereof with an operating lug II5a whichis engaged by cam roller 6a of cam IIG mounted for rotation with shaftl3, and at the end of its other arm, bellcrank H5 is provided with atriggering lug IIBb located beneath a cylindrical lug Illa (Fig. 10) oftrigger IIl (see also Fig. 11). Upon rotation of shaft l3, cam H6 isrotated to engage cam roller Ilia and operating lug Ilia of bell-crankM5, to oscillate the bell-crank Hi clockwise.

against the tension of spring I I5s, whereby triggering lug lI5b engageslug M to oscillate trigger I ll clockwise against the force of springIlls so that tooth Illt of trigger Ill and shoulder II2e of hammer II2,are released, to release the hammer for movement to the right under theforce of compressed spring II2sI. I

Means are provided to compress the. spring II2sI to thereby cook thehammer H2 comprising a cam III mounted for rotation with shaft 43 andcooperating with a roller llaa on the end of one arm of a bell-crank-II8 pivoted directly beneath pivot [I511 (Fig. 10). The other end ofbell-crank H8 is provided with an operating lug 8b (Fig. 11) cooperatingwith one lug lb of hammer H2. Bell-crank H8 is spring-biased in acounterclockwise direction in the same manner as bell-crank 5. As shaftl3 rotates, cam H1, in engagement with roller IIBa, oscillatesbell-crank IIB clockwise to engage lug II8b of its lower arm with a lugII2b of the hammer II! whereby the hammer is shifted to the left (Fig.10) against the force of spring IIZsI, to compress this spring and cockthe hammer. When the hammer is cooked, it assumes the position, asillustrated in Fig. 10, with lug II2e of the the trigger IIl thereforeholds the hammer in cocked position until trigger H4 is oscillatedclockwise by bell-crank II5, as described above,

' to release hammer II2 to perform its printing function.

Novel means are also provided for adjusting the degree of effectivenessof the printing hammer during the printing function which determines theclearance between the hammer head HM and the typewheel 36 when thehammer is released from 7 its cocked position for impact against thetape to compress the tape and ribbon against the typewheel 36. Amicrometer screw I I9 (Fig. 3) passes through a hole in the enlarged endI20a of lever I20 and is engaged by a cooperating nut IISa. By adjustingthe screw IIO, the lever I20 can be oscillated about its pivot I201:(Fig. 10) so that a stop lug I20b (Fig. 11)

of lever I20 can be adjusted in position between 2a. As lug 202: ismoved to the left, as viewed in Fig. 11, the degree of effectiveness orthe General operation While the operations of the various elements ofthe complete printer have been described in connection with theindividual elements, a brief description of the operation of allelements of the device will now be presented in order to clarify out ofthe notches and dog lift lever 48 is released for further rotation. Theassociated clutch 31 will be thereupon rotated until the newly selectedstop is engaged by dog lift lever 48 and clutch 3'! will rotate thecylindrical cam 38 (Fig. l) to rotatively position it in accordance withthe par ticular permutation of code signal elements controlling magnets53 and 55.

Rotation of cylindrical cam 38 will axially position the follower I1 andslidable element 8! to thereby similarly axially position the roller 11aand grooved collar '10 attached to the typewheel 36, to axially positionthe typewheei in one of four axial positions, to select one of the fourthe coaction of the relative parts in producing printing of charactersupon a tape in response to code signal permutations received, eachpermutation being representative of a character to be printed or afunction to be performed.

It is assumed that the tape 81 has been threaded between tape guidemember I06 (Fig, 10) and the and 90b of hammer support 90 and alsobetween the printing hammer head Illa and typewheel 36 and across theface of the printer front panel 20a and between the tape feed rollers,so

' that the tape will be automatically fed, step by step, as the printingfunctions are performed, and the ribbon H0 is assumed to be wound fromone spool, between the paper tape and typewheel, to the other spool andis ready for its automatic feeding operation.

Upon energization of the motor 2 (Fig. 3) the respective ratchet gearsand 33 (Figs. 1 and 2) of the clutches 34 and 31 are rotated at 1200RQP. M. and ratchet gear 4| (Fig. 2) of clutch 42 is rotated at 900 R.P. M.

Upon reception of a complete signal, comprising a start element, fivesignal elements of the signal proper, and a stop element, well knownstart-stop mechanism is released for rotation in synchonism with thereceived code signal elements so that the five signal elements of thesignal proper, or any permutations thereof, are provided at thereceiver, in accordance with the permutations of signal elementsreceived.

Upon reception of the five signal elements, comprising a code signalpermutation proper, certain of the magnets 50, 5| and 52 (Fig. 3), 53and 55 (Fig. 4) will be energized. Upon ener gization of any one of themagnets 5!), 5i or 52, the permutation rings 56, 51 and 58 (Fig. '7)will be released by the triggers 62 (Fig. 3) for relative rotation, toalign certain of the notches 65 so that a chosen stop element 43 will bepermitted to enter the aligned notches, and as the rings are operated toalign these notches the stop element, previously aligned, will be cammedout of its notches and dog lift lever 48 will be released and clutch 34will be engaged by engagement of tooth 4ft (Fig. 1) and the teeth ofratchet gear 30 which, as stated above, is rotated at 1200 R. P. M.Shaft will therefore be rotated until dog lift lever 48 (Fig. 3) engagesthe newly aligned stop 43 to thereby rotatively position the clutch 34,shaft 35, and typewheel 36, in accordance with the permutation of codesignals controlling the magnets 50, 5i and 52. Similarly, magnets 53 and55 (Fig. 4) are energized selectively, by the received code signalpermutation, and permutation rings 15 and 16 (Fig. 8) will be relativelyrotatively positioned to permit entry of a stop element 49 (Fig. 4) intothe newly aligned notches 65, while the previously aligned stop elementis cammed horizontal rings of characters (Fig. 2)

Since shaft 35 and typewheel 36 were rotatively positioned to choose oneof sixteen uniformly spaced vertical columns of characters and sincerotation of cylindrical cam 38 has axially positioned the typewheel toselect one of the horizontal rings of characters, one character onlywill be selectively located in printing position and this character isthat one represented by the permutation of 5-code signal elements of thesignal re ceived.

Upon energization of magnet 54, which may be designated as the printmagnet, its associated clutch 42 (Figs. 2 and 4) will be released forone complete revolution, and since ratchet gear 4! (Fig. 2) which drivesclutch 42, rotates at 900 R. P. M.,ithe shaft 43 rotated by clutch 42will also rotate at this speed.

Since shaft 35 which rotatively positions the typewheel and sincecylindrical cam 38 which axi ally positions the typewheel are bothdriven at 1200 R. P. M. while shaft 43 is rotated at 900 R. P. M.,regardless of which stop elements are selected, the shaft 35 andcylindrical cam 38 will always have completed their rotation and will behalted by the time the shaft 43 has completed three-quarters of arevolution. With the sequential system of signal transmission, asassumed in the instant application, the typewheel will be completelypositioned even quicker with respect to the rotation of shaft 43.

As shaft 43 rotates its one complete revolution, the cams attachedthereto will be also rotated, in fixed time sequence. The ribbon I I3and tape 31 will be advanced by rotation of disk can 32 (Figs. 2 and 3)the printing hammer H2 will be cooked by cam lll (Figs. 2 and 10) andthe trigger H4 will be released to cause printing, by operation of camH6 (Figs. 2 and 10). The intensity of impact of the printing hammer isad justed by screw H9 (Fig. 3) and the spacing of the characters on thetape is controlled by the particular hole 36b utilized in connectinglink 35 to the tape feed lever 36. After printing has been performed,the cams 66 and 66a reset the permutation rings 56, 51, 58, I5 and 16 tothe normal position, preparatory to reception of the next .code signalpermutation, and likewise the lever 6") (Fig. 4) controlled by the printmagnet 54 will be reset to the position. as indicated in Fig. 4, toengage the dog lift lever 48 and stop the single revolution clutch 42 atthe end of its single revolution.

If the codesignal permutation is received and is representative of thefigures shift function, the permutation rings will be so positioned thatthe cylindrical cam 38 will axiallylocate the typewheel in its extremelower position and shaft 35 will so rotatively locate the typewheel thatlug l3bl of slide 13 will be engaged by the operating lug 320 of shiftlever 82, when lever 62 is oscillated by roller 86a of cam 88 (Fig. uponrotation of shaft 43. Slide 13 will thereby be shifted to rotate thetypewheel 36 one-sixteenth of a revolution to produce the "figures shiftfunction and the permutation rings will be subsequently reset to normalposition and the lever Bib of the print magnet 54 to the position, asillustrated in Fig. 4, by operation of the reset arms 68 and 68a.

If the permutation code signal received is representative of the"letters shift function, the permutation rings will be so positionedthat the typewheel 36 will be located in its extreme upper position andso positioned rotatively that lug 13b on slide 13 will be engaged byoperating lug 83c of shiftlever 83. upon rotation of shaft 43 andconsequent rotation of cam roller 86?) on cam 86, to rotate thetypewheel one-sixteenth of a revolution to perform the letters" shiftfunction. Subsequently, the permutation rings will be returned to normalposition and the lever Blb of the print magnet '54 to the position, asindicated in Fig. 4, by means of the reset levers 68 and 68a. In the twoshift positions of the typewheel, there are no characters opposite thehammer 2 so that no character is printed upon the tape 81 duringperformance of the shift functions.

Novel selecting means are therefore provided for axially andcircumferentially orienting a typewheel in accordance with received codesignal permutations and means are provided for resetting the selectingmechanism to a normal position after each operation and stopping theoperation of a single revolution clutch.

While there has been shown and described and pointed out the fundamentalnovel features of the invention as applied to a single embodiment, itwill be understood that various omissions and substitutions and changesin the form and details of the device illustrated and in its operation,may be made by those skilled in the art, without departing from thespirit of the invention. It is the intention, therefore, to be limited,only as indicated by the scope of the following claims.

What is claimed is:

1. In a telegraph receiver of the type wherein the selection ofcharacters is controlled by a permutation code, a selecting mechanismcomprising a pair of aligned shafts, means for driving said shafts,clutch means for individually and independently connecting said shaftsand driving means, means controlled by certain elements of a receivedcode signal for rendering one of said clutches operative and forselectively stopping the same at different portions of a revolution torotatably position one of said shafts, means controlled by others ofsaid signal elements for rendering another of said clutches operativeand for selectively stopping the same at different portions of arevolution to rotatably position the other of said shafts, a typewheelmounted for axial and rotative movement, meanscontrolled by one of saidshafts for rotatably positioning said typewheel, means controlled by theother of said shafts for axially positioning said typewheel, and meansfor rotatably resetting said typewheel to a chosen initial position byrotation in the normal direction and for simultaneously axiallyresetting said typewheel to a chosen initial position.

2. In a telegraph receiver of the type wherein the selection ofcharacters is controlled by a permutation code, a selecting andpositioning mechanism comprising a pair of shafts, driving means forsaid shafts, means for individually and independently connecting saidshafts and said driving means, means controlled by certain signalelements of a received code signal for disconnecting one of said shaftsfrom its driving means and holding it in any chosen one of a pluralityof rotary positions, means controlled by the others of said signalelements for disconnecting the other shaft from its driving means andholding it in any chosen one of a plurality of rotary positions, atypewheel mounted for axial and rotative movement and connected to oneof said shafts for rotary positioning thereby, means controlled by saidother shaft for axially positioning said typewheel, and means forrotatably resetting said typewheel to a chosen initial position byrotation in the normal direction and for simultaneously axiallyresetting said typewheel to a chosen initial position.

3. In a telegraph receiver of the type wherein the selection ofcharacters is controlled by a permutation code, a permutation selectingmechanism, a typewheel mounted for rotary and axial movement, a rotaryshaft, means for rotating said shaft, clutch means for connecting saidrotating means and shaft to rotatably position said shaft selectively ineach of a plurality of predetermined positions, a second rotary shaft,

means for rotating said shaft, clutch means for connecting said rotatingmeans and shaft to retatably position said shaft selectively in each ofa plurality of predetermined positions, means controlled by one of saidshafts for rotatably positioning said typewheel, means controlled by theother of'said shafts for axially positioning said typewheel, meansincluding said selecting mechanism and responsive to certain of the codeelements of a received code signal to selectively operate one of saidclutch means, means including said selecting mechanism and responsive tothe others of said code elements to selectively operate the other ofsaid clutch means, and means for rotatably resetting said typewheel to achosen initialposition by rotation in the normal direction and forsimultaneously axially resetting tion.

4. In a, printing receiver, typewheel positioning apparatus comprising apair of rotatable shafts, means for rotating said shafts, clutch meansfor respectively connecting said shafts and said rotating means, stopmeans selectively controlled by certain code signal elements of areceived code signal for arresting each of said clutches in differentrotative positions in accordance with the particular permutation of codesignal elements received, means controlled by said shafts for axiallyand rotatably positioning said typewheel, and means for resetting toinoperative condition all but a chosen one of said stop means for eachof said clutches.

5. In a printing receiver, typewheel positioning apparatus comprising apair of aligned rotatable shafts, means for rotating said shafts,clutches for respectively connecting said shafts and rotating means,stop means selectively controlled by certain signal elements of areceived code signal for arresting each of said clutches in differentrotative positions in accordance with the particular permutation of codesignal elements received, means controlled by the rotation of one ofsaid shafts for rotatably positioning said typewheel, and means axiallymovable upon rota-- tion of the other of said shafts for axiallypositioning said typewheel. i

6. In a printing receiver, typewheel positioning apparatus comprising apair of rotatable said typewheel to a chosen initial posicertain signalelements of shafts, means for rotating said shafts, clutches forrespectively connecting said shafts and rotating means, stop meansselectively controlled by a received code signal for arresting" each ofsaid clutches in different rotative positions in accordance with theparticular permutation of code signal elements received, meanscontrolled by the notation of one of said shafts for rotatablypositioning said typewheel, means controlled by the rotation of theother of said shafts for axially positioning said typewheel, and meansfor resetting to inoperative position all except a chosen one of saidstop means for each of said clutches.

7. In a printing receiver, typewheel positioning apparatus comprising aplurality of rotatable shafts, means for rotating said shafts, clutchesfor connecting said shafts and said rotating means, stop meanscontrolled by certain code signal elements of a code signal received forcontrolling and arresting certain of said clutches in different rotativepositions, respectively, and another of said clutches in a chosenrotative position, means controlled by one of said shafts for rotatablypositioning said typewheel, means controlled by another of said shaftsfor axially positioning said typewheel, means controlled by stillanother of said shafts for shifting said typewheel, and means forresetting to inoperative position all except a chosen one of said stopmeans for each of two of said clutches and for resetting to an initialposition, the stop means of another of said clutches.

8. In a printing receiver, typewheel positioning mechanism comprising aplurality of shafts, means controlled by rotation of one of said shaftsfor rotatably positioning said typewheel, means controlled by therotation of another of said shafts for axially positioning saidtypewheel,

means controlled by the rotation of still another shaft and cooperatingwith said type- I wheel in a chosen position thereof for adjustting allof said permutation members to a chosen initial arrangement.

10. In a telegraph receiver of the type wherein the selection ofcharacters is controlled by a permutation code, a selecting mechanismcomprising a plurality of magnets, one for each of certain elements ofcode, a plurality of rotatable permutation disk members, means biasingsaid members respectively for rotation in a chosen direction, triggermeans, controlled by said magnets respectively, for selectivelyrendering said biasing means effective to set said. disks. intodifferent permutations dependent upon the signals received, and meansfor resetting each of said disks against the force of said biasingmeans.

11. In a telegraph receiver of the type wherein the selection ofcharacters is controlled-by a permutation code, a selecting mechanismcomprising a plurality of magnets, one for each of certain elements of acode, a plurality of rotatable permutation disk members, means forrotating said disks respectively and comprising a pivoted lever, one foreach disk, and attached at one end to its corresponding disk, meansbiasing each of said levers for rotation about its pivot in onedirection, trigger means'for locking said le- ,vers prior to rotation bysaid biasing means,

ing the rotative position of said typewheel, and

means for axially and rotatably resetting said typewheel withoutaltering said adjustment.

9. In a telegraph receiver of thetype wherein the selection ofcharacters is controlled by a permutation code, a selecting mechanismcomprising permutation elements, relatively adjustable in accordancewith received code signal elements, a typewheel, and means forrotatablyand axially positioning said typewheel, comprising a clutch,means controlled by saidcclutch for rotatably positioning saidtypewheel, means controlled by certain of said permutation members forselectively arresting said clutch at different portions of one completerevolution to thereby rotatably adjust the position of said typewheel inaccordance with the permutations of certain code signal elementsreceived, an operating member, a second clutch, means controlled by saidsecond clutch for rotatably positioning said operating member, meanscontrolled by certain others of said permutation members for selectivelyarresting said second clutch at different portions of one completerevolution to thereby rotatably adjust the position of said operatingmember, means controlled by said operating member for axiallypositioning said typewheel, and means for resetand means controlled bysaid magnets selectively, for releasing said trigger means.

12. In a telegraph receiver of the type wherein the selection ofcharacters is controlled by a permutation code, a selecting mechanismcomprising a plurality of magnets, one for each of certain elements of acode, a plurality of rotatable permutation disk members, means forrotating said members, respectively, and comprising a pivoted lever, onefor each disk, and attached at one end to its corresponding disk, meansbiasing each of said levers for rotation about its pivot in onedirection, means for resetting all of said levers by rotation in theopposite direction against the force of said biasing means, triggermeans respectively locking said disks in said reset position, and meanscontrolled by said magnets, respectively, for operating said triggermeans to render said biasing means operative.

13. In a device of the character described, a typewheel, means forinitially rotatably positioning said typewheel, means for axiallypositioning said typewheel, shift means for finally rotatablypositioning said typewheel comprising a movable member actuable radiallyof said typewheel, and means cooperating with said radially movablemember comprising a pair of pivoted members disposed in differentpositions, axially, of said typewheel and on opposite sides thereof,means biasing said members in a direction away from said radiallymovable member, means for movingsaid pivoted members against the forceof said biasing means,.one of said members radially shifting saidmovable member, in one chosen combined rotative and axial position ofsaid typewheel, and the other of said members radiallyshifting saidmovable member, in another chosen combined rotative and axial positionof said typewheel.

. CLYDE J. FITCH.

KURT R. SCHNEIDER.

